Just posting what seems fairly obvious to me in the hopes that Trion fixes this.
Spellspun bags are 18 slot and sell for slightly over 1 plat
Witchweave bags are 20 slot and cost too much to make for such a minor size increase (seen people try to sell them but why on earth would anyone spend 10 times the cost of spellspun for 2 slots?)
Spiritweave bags are 22 slot and would be about the same as witchweave to sell if anyone even wanted that recipe knowing they could never sell any of them.
Here's the issue and what I propose they fix:
The cost to make / value for bag size is NOT scaled properly and no one is going to buy or even bother to make a witchweave or spritweave bag unless it's for personal use because you could never sell a 20 slot bag for 10 plus plat when it's only 2 slots bigger than the 18 slot bag which is around 1 plat.
Trion, please consider making witchweave bags 24 slot and spiritweave bags 28 slot. Otherwise those recipes are basically useless for anything other than personal use because no one would ever buy one due to the massive price disparity in the mats used to make them and the miniscule gain in bag size under the current system.